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W. HACKMAN;

Machine for Punching Plow Shares.

No. 243,247. Patented .lune 21,1881.

jections.

NITED STATES PATENT Ordnen.

WILLIAM HAOKMAN, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO HlM- SELF AND DAVID TORRENOE, OF SAME PLACE.

MACHINE FOR PUNCHING PLOWSHARES.

SPECIFICATION forming part of Letters Patent No. 243,247, dated June 21, 1881.

Application filed February 15, 1881. (No model.)

To all whom it may concern:

Beit known that I,W1LLIAM HACKMAN, of Pittsburg, in the county of Allegheny and State of Pennsylvania,have invented a new and useful Improvement in Machines for Punching Plowshares; and I do hereby declare the following to be a full, clear, and exact description thereof.

Acommon, and at present a favorite, form of plowshare is provided with a thick short land. side, which is made of wrought-iron or soft steel and welded to the wing or share proper, whichis made of steel and is much thinner. This share is secured to the standard by a bolt through the wing, and another bolt through the landside. Thehole through the thin win g is easily made by punching, as it can belaid down dat upon the punchingdie, and can be rmly held under the punch; but the thick short landside, extending at an acute angle to the share, cannot be laid down upon the punching-die and held square under the punch. Consequently the bolt-hole through the landside has always been drilled. This is open to a number of ob- The plow-bolt has a square neck to prevent its turning and unscrewing from its nut. A square hole can be punched, but not drilled, and hence the bolt-hole in the landside was round, and the advantage of the square hole was lost. Again, the drilling operation is more expensive than punching, and requires an additional workman, and the marking of the landside by a center-punch was necessary, in order to have the shares all drilled alike and duplicates. This is an additional operation, and adds to the expense.

My invention consists of an improved punching-machine, by means of which both of the bolt-holes of the share can be punched.

To enable others skilled in the art to make and use my invention, I will now proceed to describe its construction and manner of use by reference to the accompanying drawings, in which- Figure lis a perspective view ofmy improved share-punching die. Fig. 2 is a perspective view of the plowshare. Fig. 3 is a vertical section of the machine with the share in position to be punched.

Like letters of reference indicate like parts in each.

The plowshare a has a wing, b, and a landside, c. The bolt-holes are shown at d and c. The hole d` in the wing is in a plain portion, which is removed from the landside and easily inserted under the punch, and the wing, being thin, is easily held while being punched. It is different, however, with the hole e,which is in the narrow thick landside c. Owing to the angle at which the latter stands to the wing b, it cannot be brought and held under the punch with the dies heretofore used. I make a punching-die, f, of steel or other suitable material, with a punch-hole, g, and a hollow or beveled edge,fh, preferably forming the same angle wlth the face of the die as the wing bforms with the landside c. The die or bed f is mounted in a suitable frame, n, under the punch m, which 1s operated by au eccentric and yoke, o, or by other suitable means. Then, when the share a is placed on the die, as shown in Fig. 3, the landside c is in proper position to be punched, and can be held iirmly under the punch m during the punching operation by merely holding it up against the edge of the die. ThusI am enabled to punch a square hole in the landside, and obviate the necessity for the slower and more expensive drilling operation.

If desired, a gage, fi, may be applied to the die, against which the edge of the share can be placed in punching. This, however, is more convenient than necessary.

I prefer to make the die f duplicate in formthat is, with the bevel h on both edges, so that when one is worn out the other can be used. The bolt-hole d may be punched on the same die by simply turning the share.

The gage i may be secured by the bolt k, which secures the dief to its bed.

In addition to the advantages named much time, labor, and expensive machinery is saved by my improvement, which may be used with any ordinary punch. Shares can be punched much more rapidly than drilled. The second handling is saved by punching both holes.

What I claim, and desire to secure b y Letters Patent, is-

1. In a 'machine for punching plowshares, said machine consisting of a bed or anvil block and reciprocating punch, the anvil block or bed having a punch-hole near the edge thereof, a pla-in upper surface for the landside, and an IOO acutely beveled or undercut ed ge for the reception of the Wing of the share7 and to permit the proper adjustment of the landside upon the bed beneath the punch, whereby the saine machine is adapted for punching both lthe landside and Wing` of the share7 substantially as specified.

2. The die or bed for punching` plowshares herein described, having a plain face with a 1o punch-hole in it, an acutely-beveled edge7 and a gage for centering the share properly to the punch-hole, substantially as and for the pnrpose described.

In testimony whereof I have hereunto set my hand.

WM. HAOKMAN. Witnesses:

T. B. KEER, DAVID TORRENCE. 

